Question: What is the position did William Henry Bragg have in the Royal Society, start and end date?
Paraphrase: What is the start and end date of the position did William Henry Bragg have?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q133747 p:P39 ?s . ?s ps:P39 wd:Q55713110 . ?s pq:P582 ?value1 . ?s pq:P580 ?value2 }